I've never root pruned a plant. I've taken them out and only repotted a portion, but I've never cut down the roots and then put the whole plant back in with new soil. I really have to try that sometime. I can't handle a hanging pot much larger than this. They get too heavy. The one in the photo is 15" in diameter. I don't think I could manage it hanging if it were clay, which is my usual preference for a container. It's heavy with just the resin container.